Re: [Xen-devel] [OSSTEST PATCH v11 11/20] ts-openstack-deploy: Increase fd and memory limits for rabbitmq

[Ian Jackson <ian.jackson@xxxxxxxxxxxxx>]

Anthony PERARD writes ("Re: [OSSTEST PATCH v11 11/20] ts-openstack-deploy: 
Increase fd and memory limits for rabbitmq"):
> On Fri, Jun 23, 2017 at 04:34:41PM +0100, Ian Jackson wrote:
> > And if one isn't using systemd ?
> 
> I guess it would have to fix devstack. Also, the default is 1k, devstack
> increase it to 2k, but rabbitmq on Ubuntu have a limit at 65k.

My point is this: unless openstack intend to support only systemd, it
is a bug that devstack is not fixed in this way.  So that bug ought to
be filed and referenced in the workaround in openstack.

I'm not sure I'm qualified to comment on the distinction between
devstack's and ubuntu's fd limits, but shouldn't there be an openstack
bug about that too ?

> > > As for the memory limit, it was necessary with a host of 4G of RAM. But
> > > I did not try again with the default limit and a host with 6G of RAM.
> > > (The default is 0.4, here I've set it to 0.8)
> > 
> > It sounds like the default calculation is not right, then ?
> 
> I think 0.4 means 40% of the RAM. Sorry, I should have said so. Also,
> 0.4 is the same on the CI loop, with a dom0 of 7G or so.

Yes, I understood that 0.4 to mean 40% of RAM.

My point is that a calculation which gives too-small a value on a 4G
host could be improved.  May the calculation should be "40% of RAM,
but at least 3G" or something ?  Again, this might warrant an upstream bug.

Ian.

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